CN102073313A - Remote management measurement and control system of solar photovoltaic power stations - Google Patents
Remote management measurement and control system of solar photovoltaic power stations Download PDFInfo
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Abstract
The invention discloses a remote management measurement and control system of solar photovoltaic power stations, which comprises a first communication interface unit, a microprocessor and a wireless communication module, wherein the first communication interface unit is connected with electricity meters of the photovoltaic power stations and is used for receiving electric quantity data of the electricity meters; the microprocessor is connected with the communication interface unit, and is used for acquiring the electric quantity data through the communication interface unit, carrying out format conversion on the electric quantity data and sending the converted electric quantity data into the wireless communication module; the wireless communication module is connected with the microprocessor and is used for sending the electric quantity data converted by the microprocessor into a far-end power distribution center in a way of wireless communication, so that the electric quantity data can be conveniently monitored by the power distribution center. The real-time report of the electric quantity data can be realized by the system, so that the electric quantity data can be further monitored in real time.
Description
Technical field
The present invention relates to field of photovoltaic power generation, relate in particular to a kind of solar photovoltaic power plant telemanagement TT﹠C system.
Background technology
At present, because resource scarcity, environmental protection, sun power substitutes traditional energy with its exclusive characteristics efficiently, becomes one of focus that people pay close attention to.
In recent years, photovoltaic plant is set up in many countries and area on a large scale, realizes generating electricity by way of merging two or more grid systems, not only environmental protection and energy saving but also can obtain considerable economic.But singularity such as quantity is many because photovoltaic plant has, scale is big, geographic position dispersion bring great inconvenience for staff's monitoring, maintenance work.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is, a kind of solar photovoltaic power plant telemanagement TT﹠C system is provided, and can realize the real-time monitoring for electric quantity data.
For this reason, the embodiment of the invention adopts following technical scheme:
The embodiment of the invention provides a kind of solar photovoltaic power plant telemanagement TT﹠C system, comprising:
First communications interface unit connects the ammeter of each photovoltaic plant, receives the electric quantity data in each described ammeter;
Microprocessor connects described communications interface unit, obtains described electric quantity data by communications interface unit, and described electric quantity data is carried out format conversion, and the electric quantity data after the conversion is sent to wireless communication module;
Wireless communication module connects described microprocessor, the electric quantity data after the microprocessor conversion is sent to the distribution center of far-end by communication, so that described distribution center monitors electric quantity data.
Described communications interface unit is the RS485 communications interface unit.
Be connected by the RS232 communications interface unit between described microprocessor and the wireless communication module;
Accordingly, specifically to be used for electric quantity data be the RS232 interface data from RS485 interface data format conversion to microprocessor.
Also comprise:
Power Supply Monitoring and reset unit connect described microprocessor, are used for the power supply of microprocessor is monitored, and when microprocessor is unusual, microprocessor are resetted; And/or,
Clock unit connects described microprocessor, is used to carry out system time control and real-time time and shows; And/or,
First power supply unit connects described microprocessor, is used to microprocessor to provide microprocessor required rated direct voltage; And/or,
The man-machine interface unit connects described microprocessor, is used to provide the communication interface between microprocessor and the display device, and/or, the communication interface between microprocessor and the keyboard input devices is provided; And/or,
Memory cell connects described microprocessor, is used for the service data and the historical data of storage microprocessor; And/or,
The jtag interface unit connects described microprocessor, is used to realize download for the on-line debugging and the program of microprocessor.
Also comprise:
The SIM card unit connects wireless communication module, is used to realize the data transmission between wireless communication module and the wireless network; And/or,
Start unit connects wireless communication module, is used to start wireless communication module; And/or,
The second source unit connects wireless communication module, is used to wireless communication module to provide wireless communication module required rated direct voltage; And/or,
The second communication interface unit connects wireless communication module, is used to obtain the operating state data of wireless communication module, and these data are sent to the duty of corresponding watch-dog with the monitoring wireless communication module; And/or,
Audio output unit connects wireless communication module, is used to obtain the voice data and the output of wireless communication module.
Described microprocessor is realized by the ARM control module.
Described wireless communication module is realized by wireless communication chips MC55.
Described RS485 communications interface unit is realized by chip SN75LBC184.
Carry out electrical isolation by photoelectrical coupler between each ammeter and the RS485 communications interface unit.
Technique effect for technique scheme is analyzed as follows:
Communications interface unit receives the electric quantity data in each described ammeter; Microprocessor carries out format conversion to described electric quantity data; Wireless communication module, electric quantity data after the microprocessor conversion is sent to the distribution center of far-end by communication, so that described distribution center monitors electric quantity data, realized real-time report, and then realized real-time monitoring for electric quantity data for electric quantity data.
Description of drawings
Fig. 1 is an embodiment of the invention solar photovoltaic power plant telemanagement TT﹠C system structural representation;
Fig. 2 is the electrical block diagram of the embodiment of the invention based on LPC2138;
Fig. 3 is the electrical block diagram of the embodiment of the invention based on MC55.
Embodiment
Below, be described with reference to the accompanying drawings the realization of embodiment of the invention solar photovoltaic power plant telemanagement TT﹠C system.
Fig. 1 is an embodiment of the invention solar photovoltaic power plant telemanagement TT﹠C system structural representation, and as shown in Figure 1, this system comprises:
First communications interface unit 110 connects the ammeter of each photovoltaic plant, receives the electric quantity data in each described ammeter; Preferably, described communications interface unit can be the RS485 communications interface unit.
Wherein, can be connected by the RS232 communications interface unit between described microprocessor 120 and the wireless communication module 130; Accordingly, specifically to be used for electric quantity data be the RS232 interface data from RS485 interface data format conversion to microprocessor 120.
In addition, this system can also comprise:
Power Supply Monitoring and reset unit 150 connect described microprocessor 120, are used for the power supply of microprocessor 120 is monitored, and when microprocessor 120 is unusual, microprocessor 120 are resetted; And/or,
First power supply unit 180 connects described microprocessor 120, is used to microprocessor 120 to provide microprocessor 120 required rated direct voltage; And/or,
Man-machine interface unit 122 connects described microprocessor 120, is used to provide the communication interface between microprocessor 120 and the display device, and/or, the communication interface between microprocessor 120 and the keyboard input devices is provided; And/or,
Jtag interface unit 230 connects described microprocessor 120, is used to realize download for the on-line debugging and the program of microprocessor 120;
In addition, this system can also comprise:
Start unit 250 connects wireless communication module 130, is used to start wireless communication module 130; And/or,
Second communication interface unit 131 connects wireless communication module 130, is used to obtain the operating state data of wireless communication module 130, and these data are sent to the duty of corresponding watch-dog with monitoring wireless communication module 130; And/or,
Below, the realization to each structure among above-mentioned Fig. 1 is described in more detail respectively.
(1) microprocessor 120
Described microprocessor 120 can pass through the ARM control module, further, can realize by microprocessor chip LPC2138.As shown in Figure 2, the pin that microprocessor chip LPC2138 comprises sees accompanying drawing 2 for details, does not give unnecessary details here.
(2) first communications interface units 110
Communications interface unit can be the RS485 communications interface unit, and at this moment, this unit can realize that for example can pass through as SN75LBC184, chips such as SN15LSC184 perhaps shown in Figure 2 are realized, do not limited by existing various RS485 interface chips here.
Adopt the RS-485 communications interface unit as the communication interface between ammeter and the microprocessor, can very easily many equipment be formed a Control Network.RS-485 bus communication pattern is simple in structure owing to having, cheap, communication distance and message transmission rate are suitable etc., and characteristics are widely used.
In addition, can carry out electrical isolation by photoelectrical coupler between communications interface unit and each ammeter, to improve the reliability of work.For example can use TLP18M among photoelectrical coupler TLP521 or Fig. 2 etc., not limit here.
As shown in Figure 2; provided a kind of a kind of specific implementation structure of embodiment of the invention RS485 communications interface unit; wherein; used a kind of RS485 interface chip SN15LSC184, it adopts single power supply VCC, voltage+3～+ can both operate as normal in the 5.5V scope; this chip can not only significantly improve and prevent that thunder and lightning from damaging the reliability of device; and effectively control electromagnetic interference (EMI), the scene more abominable to some environment, can be directly and transmission line join and without any need for adding protecting component.Simultaneously, also used photoelectrical coupler TLP18M to carry out electrical isolation.
In the circuit structure as shown in Figure 2, the pin TR+ of RS485 interface chip SN15LSC184 is connected 485B and two buses of 485A respectively with TR-; And, be in series with respectively between pin TR+ and the TR-: the diode D1 and the D2 of differential concatenation; The diode D3 and the D4 of differential concatenation; Chuan Lian resistance R 10, capacitor C 1, resistance R 11 successively; Stabilivolt SA5CA1; And, be connected a stabilivolt SA5CA2 between the negative electrode of diode D2 and the negative electrode of D3; And the negative electrode of diode D4 is connected with the end that capacitor C 1 links to each other with resistance R 11; The voltage of the pin connection+5V of RS485 interface chip; Pin GND ground connection; Pin RXD, TXD link to each other with the pin of photoelectrical coupler TLP18M respectively with E.TLP18M links to each other with pin P0.8/TXD1, P0.10/RS485EN and the P0.9/RXD1 of LPC2138.
In working order down, when the P0.10=0 of LPC2138, the lumination of light emitting diode of photoelectrical coupler, the phototriode conducting, output HIGH voltage (+5V), choose the TXD end of SN15LSC184, allow to send; When P0.10=1, the light emitting diode of photoelectrical coupler is not luminous, not conducting of phototriode, and output LOW voltage (0V) chooses the RXD of SN15LSC184 to hold, and allows to receive; D1-D4 is the signal limiter diode.Two-way transition diode SA5CA1 and SA5CA2, its voltage stabilizing value should guarantee to meet the RS485 standard, with guarantee that the signal amplitude that RS485 gathers is limited to 7～+ 12V between, further improve the ability of anti-overvoltage.
(3) wireless communication module 130
Described wireless communication module can be realized by the GPRS communication module, further, can realize by GPRS chip MC55.Wherein, the chip pin of MC55 is not given unnecessary details as shown in Figure 3 here.
Except above module, can also comprise a plurality of unit that link to each other with microprocessor in the described system, so that allow microprocessor better work, below introduce one by one respectively by (4)～(9):
(4) Power Supply Monitoring and reset unit 150
For the microprocessor chip LPC2138 of reality, because microprocessor chip LPC2138 realizes high speed, low-power consumption, the low-work voltage of chip and causes its noise margin low, when operation, very likely disturb and disturbed phenomenon, the phenomenon that crashes may occur when serious.Adopting the automatic reset circuit with function for monitoring can overcome this situation on hardware takes place.
Power Supply Monitoring and reset unit are mainly realized by the microprocessor monitors chip MAX706T of MAXM company in the embodiment of the invention.Chip MAX706T has house dog, power on automatically reset, manual reset function and low-voltage warning function.
As Fig. 2 is a kind of circuit implementation structure based on chip MAX706T of embodiment of the invention Power Supply Monitoring and reset unit, wherein,
The pin GND of chip MAX706T and PFI ground connection; Pin RST connects the pin RESET of microprocessor chip LPC2138; Pin WDO is connected with pin MR; Pin WDI receives drive signal; Pin VCC connects the 3.3V power supply.
Down, the WDI watchdog circuit input end signal of MAX706T can be specific input signal, also can be read-write, can both drive the WDI pin in working order.During microprocessor chip LPC2138 operate as normal, drive the WDI pin in 1.6S, microprocessor chip LPC2138 can not be reset.If the deadlock phenomenon appears in microprocessor chip LPC2138, pin WDO then output low level drags down the pin RESET of microprocessor chip LPC2138 to pin MR, and microprocessor chip LPC2138 will reset.This circuit automatically resets when powering on, and supply voltage surpasses after the thresholding that resets, and will produce the reset pulse of 200ms.
(5) clock unit
Clock unit can realize by system clock unit and real-time clock unit in actual applications, below describes respectively:
A, system clock unit 160
Be illustrated in figure 2 as the realization circuit structure of system clock unit, wherein, between the pin XTAL1 of microprocessor chip LPC2138 and XTAL2, connect a crystal Y1, and these crystal two ends are respectively by capacitor C 3 and C4 ground connection;
In working order down, the crystal oscillating circuit that utilizes microprocessor chip LPC2138 inside to be provided produces system clock, carries out system time control.
B, real-time clock unit 170
The real-time clock unit provides a cover counter, when microprocessor powers on shutoff operation the time is measured.The power that the real-time clock unit consumes under power-down mode is very low, makes it be suitable for the system of battery-powered CPU (idle pulley).The real-time clock of microprocessor chip LPC2138 is made up of the silver-colored zinc button cell of 32.768kHz oscillator and 3.3V independently.
As shown in Figure 2, be the implementation structure synoptic diagram of embodiment of the invention real-time clock unit, wherein, between the pin RTCX1 of microprocessor chip LPC2138 and RTCX2, connect crystal Y2 and resistance R 7 in parallel; Pin RTCX1 and RTCX2 are also respectively by capacitor C 5 and C6 ground connection.
(6) first power supply units 180
In embodiments of the present invention, need use the power supply of several different magnitudes of voltage, be respectively: the direct current of 5V, 3.3V, 3.6V, wherein the power supply of 3.6V is a power supply of giving the GPRS wireless communication module power supply separately, to be described in the second source unit later, only introduce two power supplys of 5V and 3.3V here.
Wherein, the DC voltage that the voltage of 220V directly can be converted to two-way 5V is respectively as the power supply of reference voltage V CC and RS485 communications interface unit.
In addition, in embodiments of the present invention, microprocessor chip LPC2138, AT24C16 (EEPROM), AT45DB32 (Flash) and its some peripheral components, connect the supply voltage that E1, reset button etc. need 3.3V as JTAG, at this moment, can realize by the 5V voltage transitions being 3.3V voltage, thereby can simplify circuit design, well utilize existing resource simultaneously.
As shown in Figure 2, be that a kind of 5V changes the change-over circuit of 3.3V, the power supply by power supply chip AS1117-33 general+5V changes into+3.3V, and the electric current that can have a 800mA exports, and satisfies circuit requirements.As shown in Figure 2, this circuit comprises: the pin I of power supply chip AS1117-33 connects reference voltage V CC (5V); Reference voltage V CC is by capacitor C 5 ground connection; Pin GND ground connection; Pin O passes through capacitor C 8 ground connection, and, also by capacitor C 10, capacitor C 9, diode D5 and capacitor C 8 ground connection.Then pin O one end will be exported 3.3V voltage, be used to power supplies such as microprocessor chip LPC2138.
(7) man-machine interface unit
For operability and the maintainability that improves native system, make things convenient for the staff at the scene to the test and the maintenance of system, in native system, can design directly perceived and friendly man-machine interface, flexibly, conveniently provide advantage for exploitation and operation, for example can comprise relevant information is outputed to the circuit that LCD shows, and utilize keyboard input to set and revise the circuit that is stored in the system operational parameters among the LPC2138.
1. the Keyboard Control unit 190
In the design keyboard entry function, consider the effect of keyboard in practical operation and the mode of parameter setting, can adopt 2 keys to finish keyboard operation, wherein key S2 is used for carrying out unidirectional circulation choice menus, and key S3 is used for confirming selected menu.Utilize the pin P0.15 of LPC2138 and the input signal that P0.16 (KEY1 and KEY2) receives keyboard, in software program, judge the key of being pressed, and realize as revise the corresponding operation of terminal address, baud rate etc.
As shown in Figure 2, the realization circuit of this unit comprises:
3.3V voltage connect pin P0.15 pin KEY1 by resistance R 8, and by switch S 2 ground connection; 3.3V voltage connect P0.16 pin KEY2 by resistance R 9, and by switch S 3 ground connection.
2. the LCD liquid crystal display circuit 200
Can select for use 12232H02 dot character type liquid crystal as display device in the native system, information such as circulation display terminal working time, state, terminal address when terminal is idle, and when parameter being set, show relevant operation information with keyboard, for operating personnel's work facilitates.Concrete displaying contents and pattern will realize by software program.As shown in Figure 2, can connect 8 position datawires of Liquid Crystal Module with pin P1.16～P1.23 of LPC2138, as the input end of display message.P0.13 pin CS2 is as the chip enable signal pin of Liquid Crystal Module; P0.23 pin RS output is as the register selection signal of HD44780, low level represent from the input of 8 position datawires be the order that is provided with to Liquid Crystal Module, what high level was represented to import from data line is to want data presented; P0.12 pin CS1 is as the control signal of LCD backlight lamp.P0.22 pin RW finishes the control to the liquid crystal read-write.In order to strengthen the data bus driving force, native system uses two chip 74HC245, and a slice drives as the buffering of liquid crystal display data signal, and a slice drives as the buffering of liquid crystal control signal in addition.
(8) memory cell
The SRAM of LPC2138 the is integrated FLASH of 512KB, 32KB is as procedure stores and running space, the operational factor of the electrically erasable programmable ROM of external a slice 12C interface (EEPROM) AT24C16 (16K bit) storage system, main, be the operational factor in the microprocessor, the temporary new procedures that receives when a slice serial peripheral equipment is established Flash AT45DB32 (32Mbit) store historical data of interface (SPI, Serial Peripheral interface) interface and remote software upgrade.
1. eeprom memory 210
The security of systematic parameter and reliability are the problems that the deviser at first considers, so native system preferably adds the outer eeprom chip of sheet.EEPROM can onlinely rewrite, and data are not lost after the power down, thereby more and more is subject to people's attention, and is used widely in fields such as intelligence instrument, control device.
As shown in Figure 2; A0～A2 is an address input pin; when being used for multi-disc AT24C16 and using simultaneously, connect corresponding high-low level and can be used as the sheet choosing, be enough to the configuration information of storage terminal for native system 16K bytes of memory space; so equal ground connection of A0～A2; chip select address is that 000, the 7 pin WP is the protection pin, when pin WP meets VCC; only allow half to rewrite, can rewrite whole memory block when being connected to GND the low address of internal storage.Pin SCL is the clock control end of read/write, and pin SDA is the data output/inlet of read-write.
2. the FLASH storer 220
The Flash storer is that a kind of can to carry out electricity in system erasable, the storer that information is not lost after the power down.Characteristics such as but it has low-power consumption, high capacity, erasable speed fast full wafer or branchs sector in-system programming (programming), wipe, and can finish operation by the algorithm of inside embedding to chip.
The SPI Serial Peripheral Interface is a kind of high speed, full duplex, synchronous communication bus, and this interface generally only uses 4 lines: pin CS---the slave unit enable signal, control by main equipment; Pin SCK---clock signal is produced by main equipment; Pin SI---main equipment data input, the output of slave unit data; Pin SO---main equipment data output, the input of slave unit data.In Fig. 2, the 11st～14 pin of AT45DB32 is four lines of SPI interface, these four lines are connected with pin SSEL0, SCK0, MOSI0 and the MISO0 of microprocessor chip LPC2138 respectively, realize duplex communication, here master controller LPC2138 is as main frame, AT45DB32 is as slave, so chip selection signal in the communication process and clock signal all come from LPC2138.
(9) the jtag interface unit 230
LPC2138 is the microprocessor chip of FLASH type, and its a big advantage is exactly to realize the download of program code by jtag controller, and utilizes it to finish the on-line debugging of software.Pin 3 (TRST), 5 (TD1), 7 (TMS), 9 (TCK), 11 (RTCK), 13 (TD0) and 15 (RESET) with JTAG module in the LPC2138 on circuit board draw respectively, constitute a jtag interface, as shown in Figure 2.In the process of debugging, one of the emulator of LPC2138 is terminated on the parallel port of PC, the other end is received on the jtag interface on the circuit board just can carry out the download of online debugging and program.Jtag interface when the slave computer terminal software of debugging native system, utilizes on-line debugging for designing and developing the very useful of process, can carry out the modification of program and the test of running status very easily, has accelerated the progress of design and exploitation greatly.
In order to make the GPRS communication unit better work, native system can also comprise:
(10) the SIM card unit 240
Chip MC55 will insert GPRS network just must use SIM card, and it has carried a SIM card and has driven.As shown in Figure 3; the signal relevant with the SIM card operation directly is drawn out to the corresponding pin CCCLK of MC55, CCRST, CCVCC, SGND and CCIO; the SIM card interface that is made of above-mentioned pin has comprised the required function of all SIM card operations; MC55 supports the SIM card of 1.8V or 3V; and in inside the line for SIM card provides esd protection, improved the reliability and the antijamming capability of system.The baseband controller of MC55 module is integrated SIM card interface (compatible IS07816 standard).Pin CCVCC is that it directly comes from MC55 to the power supply input pin of SIM card power supply, and directly to the SIM card power supply, supply voltage can satisfy the operation requirement of SIM card fully between 1.8V～3V by MC55.Pin CCIO is the serial communication signals of SIM card and MC55 module, and it is responsible for the data transmission between SIM card and the MC55.Pin CCRST is that MC55 is used for signal input pin that SIM card is resetted.Pin CCCLK is the clock signal pin, and it is responsible for coordinating the work between SIM card and the MC55.
(11) start unit 250
Have dual mode can control the switch of MC55: the one, utilize the ON/OFF signal; The 2nd, utilize to start (IGN) signal.Native system utilizes the IGN signal to finish the control of the switch of MC55, as shown in Figure 3, utilizes the timing spill over of chip MAX813L to be used as the input of IGN signal.When system powered on, from low level of RESET pin output of MAX813L, anti-phase through phase inverter CD4069UBC was high level, thereby opens MC55.In order to guarantee that MC55 is in opening always, in system's operational process, to remain the IGN signal and be in high level state all the time.In addition, and needn't worry master controller reset or other situation can influence the on off state of MC55 when taking place, because have only after the IGN signal is dragged down 500ms and just can close the MC55 module, so enough master controllers are finished initialization procedure Chang time, and keep the opening of MC55 from P3.0 pin output high level.
(12) second communication interface unit
MC55 has two Asynchronous Serial Interface ASC0260 and ASCl 270.
1) ASC0260:8 line serial line interface comprises data line TDO and RXDO, condition line RTSO and CTSO and control line DTRO, DSRO, DCDO and BINGO.Wherein important single line be BINGO. it be used for showing incoming signal and URC (object code), it can also provide pulse to host computer, such as being used for application program is waken up from energy-saving mode.ASC0 is mainly used in audio call, CSD calling, fax and gprs service, can also pass through AT instruction control MC55.Circuit structure example when being illustrated in figure 3 as this interface realization communication.
2) ASC1270:4 line serial line interface comprises pin TXD1 and RXD1, is used for the pin RTS1 and the CTS1 of hardware handshaking.Pin ASC1 is used for audio call, gprs service and MC55 is carried out the AT instruction control, is not suitable for CSD calling, fax and multiplexer mode.When ASC0 was in multiplexer mode, ASC1 was unavailable.Utilize ASC1, system is linked to each other with computer by J10, the running status of on-line monitoring MC55, promptly ASC1 only externally sends data when module is worked, and sends the duty of GPRS engine.Circuit structure example when being illustrated in figure 3 as this interface realization communication.
In the native system, communication between MC55 and the LPC2138 can be finished by ASC0 interface separately, as shown in Figure 3, owing to have only RXD and TXD to be responsible for outside the real data transmission work, other signal all is the signals that are used for finishing hardware handshaking, so hardware flow control is not adopted in decision in the design, but make up a serial communication of simplifying, only utilize two signals of RXD and TXD and the LPC2138 realization is communicated by letter, and other six signals all need not, they are vacant, J4 among the figure is a debug port, by being used of switch SW 1, both can debug the GPRS communication module by computer like this, also can debug microprocessor chip LPC2138.
(13) audio output unit
Chip MC55 has two different microphone input ports and two different loudspeaker delivery outlets, can constitute microphone circuit linkage unit and speaker circuit linkage unit by circuit respectively, so that connect microphone and loudspeaker.
1. microphone circuit linkage unit (MIC1280, MIC2310)
The words that audio output port MIC1 links to each other with external unit then need external bias circuit, and the inductance capacitance coupling has been integrated among the chip MC55, and its differentiating circuit connects as shown in Figure 3, and wherein resistance R 26 and resistance R 29 cooperate capacitor C 35 as power filter; Capacitor C 30 must be close as much as possible with microphone, and it is close that inductance L 1, inductance L 2, capacitor C 27, capacitor C 28 and 29 of capacitor C will go up the audio interface that is made of pin MICP1, MICN1 with chip MC55.
Audio output port MIC2 has comprised electric microphone bias voltage, can directly link to each other, and audio output port MIC1 does not comprise internal bias voltage with handheld device, so MIC1 link to each other with handheld device need be at the external bias voltage of module.Audio output port MIC2 can be direct-connected with microphone, under circuit parameter shown in Figure 3, recommends to use the microphone of 0.5MA, 2V.The inductance capacitance coupling is integrated among the chip MC55, and the differentiating circuit of MIC2 connects as shown in Figure 3, and two ports of audio output port MIC2 are connected MICP2 and two pins of MICN2 of MC55 respectively with inductance L 4 by inductance L 3.
2. speaker circuit linkage unit 290 (SPK1, SPK2)
For connecing loudspeaker in the MC55 periphery, connected mode has: differentiating circuit connects and is connected with single-end circuit.Use the differentiating circuit connected mode, can effectively resist the module noise, differential mode circuit connects comparatively simple, and the SPK end that the positive and negative terminal of loudspeaker is directly connected to MC55 gets final product, and physical circuit as shown in Figure 3.
In addition, use the single-end circuit connected mode to connect, compare the differential connected mode, consume 1/2 power consumption more, and in use, guarantee to have a good ground plane, and good filter function will be arranged to avoid interference from voice-grade channel.Single-ended connected mode circuit theory diagrams 300 as shown in Figure 3.
(14) the second source unit 320
Adopt MIC29302BU voltage stabilizing chip that the 5V voltage of reference voltage V CC is reduced to voltage 3.6V in the native system, MC55 is powered.It is simply efficient, and load adjustment capability is preferably arranged, required outer member seldom, current driving ability can reach 3A, can satisfy the needs of MC55.
The feed circuit of MC55 as shown in Figure 3, the output voltage theoretical calculation formula is: Vout=1.240 (1+R22/R21), output voltage V out=3.82V is approximately higher than operating voltage 3.6V, can satisfy the power requirement to MC55.In order to reduce voltage decline scope at data transfer phase, on near the power lead of MC55 and ground wire also cross-over connection an electrochemical capacitor C9, value is 1000uF, can bear 16V voltage, at ordinary times as energy-storage travelling wave tube, when being in data transfer phase, release energy, thereby reduce the drop-out value of voltage.
In above embodiment of the invention accompanying drawing, the general reference parameter that has all provided each device, in actual applications, those skilled in the art can carry out adaptability revision to above parameter easily, to satisfy different systematic parameter demands, repeat no more here.
In the solar photovoltaic power plant telemanagement TT﹠C system of the embodiment of the invention, can support to use communication for example mode such as GPRS or GSM carry out reporting of electric quantity data, data report does not have time-delay, make the distribution center of far-end can receive and handle a plurality of/electric quantity data that all data collection points report synchronously, satisfied real-time requirement for data acquisition and transmission;
And, carry out reporting of electric quantity data by communication, thereby realized Long-distance Control; And, not needing for remote meter reading connects up specially, construction cost is low; And, can realize the data acquisition in wider scope; And dilatation is unrestricted, the setting of data collection point also without limits, as long as can carry out radio communication; And employing communication for example GPRS mode carries out the transmission of electric quantity data, the message transmission rate height, and expense is low.
And then, when each ammeter uses the transmission of GPRS transparent data, link to each other with distribution center by GPRS network.Distribution center registers each ammeter data collection point, preserves related data so that identification and maintenance are handled; Each ammeter data collection point operational system software is supported 24 hours real-time onlines, realizes that information gathering point transmitted the ammeter data of gathering in 24 hours.Because the singularity of system, native system needs high system security assurance and stability; Safety guarantee mainly is to prevent from having a mind to and broken unintentionally ring inside and outside the system, stablizes to be meant that system can run without interruption in 7 * 24 hours, even the hardware and software fault occurs, system can not interrupt run.For the specific user, can distribute specific user ID and password for each portable terminal by data center, other do not have the user ID of data center's distribution and the portable terminal of password can't login the system of entering, and the security of system further strengthens.The firewall filtering of safety is provided with firewall software safeguards system safety etc., repeats no more here.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. a solar photovoltaic power plant telemanagement TT﹠C system is characterized in that, comprising:
First communications interface unit connects the ammeter of each photovoltaic plant, receives the electric quantity data in each described ammeter;
Microprocessor connects described communications interface unit, obtains described electric quantity data by communications interface unit, and described electric quantity data is carried out format conversion, and the electric quantity data after the conversion is sent to wireless communication module;
Wireless communication module connects described microprocessor, the electric quantity data after the microprocessor conversion is sent to the distribution center of far-end by communication, so that described distribution center monitors electric quantity data.
2. system according to claim 1 is characterized in that, described communications interface unit is the RS485 communications interface unit.
3. system according to claim 2 is characterized in that, is connected by the RS232 communications interface unit between described microprocessor and the wireless communication module;
Accordingly, specifically to be used for electric quantity data be the RS232 interface data from RS485 interface data format conversion to microprocessor.
4. system according to claim 1 is characterized in that, also comprises:
Power Supply Monitoring and reset unit connect described microprocessor, are used for the power supply of microprocessor is monitored, and when microprocessor is unusual, microprocessor are resetted; And/or,
Clock unit connects described microprocessor, is used to carry out system time control and real-time time and shows; And/or,
First power supply unit connects described microprocessor, is used to microprocessor to provide microprocessor required rated direct voltage; And/or,
The man-machine interface unit connects described microprocessor, is used to provide the communication interface between microprocessor and the display device, and/or, the communication interface between microprocessor and the keyboard input devices is provided; And/or,
Memory cell connects described microprocessor, is used for the service data and the historical data of storage microprocessor; And/or,
The jtag interface unit connects described microprocessor, is used to realize download for the on-line debugging and the program of microprocessor.
5. system according to claim 1 is characterized in that, also comprises:
The SIM card unit connects wireless communication module, is used to realize the data transmission between wireless communication module and the wireless network; And/or,
Start unit connects wireless communication module, is used to start wireless communication module; And/or,
The second source unit connects wireless communication module, is used to wireless communication module to provide wireless communication module required rated direct voltage; And/or,
The second communication interface unit connects wireless communication module, is used to obtain the operating state data of wireless communication module, and these data are sent to the duty of corresponding watch-dog with the monitoring wireless communication module; And/or,
Audio output unit connects wireless communication module, is used to obtain the voice data and the output of wireless communication module.
6. according to each described system of claim 1 to 4, it is characterized in that described microprocessor is realized by the ARM control module.
7. according to each described system of claim 1 to 4, it is characterized in that described wireless communication module is realized by wireless communication chips MC55.
8. according to each described system of claim 1 to 4, it is characterized in that described RS485 communications interface unit is realized by chip SN75LBC184.
9. system according to claim 8 is characterized in that, carries out electrical isolation by photoelectrical coupler between each ammeter and the RS485 communications interface unit.
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| CN2010106160307A CN102073313A (en) | 2010-12-30 | 2010-12-30 | Remote management measurement and control system of solar photovoltaic power stations |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102664390A (en) * | 2012-05-22 | 2012-09-12 | 普尔盾电气（上海）有限公司 | Digital general protection observing and controlling device |
| CN103001980A (en) * | 2011-09-08 | 2013-03-27 | 黄利刚 | Solar combiner box data acquiring and processing module supportive to multiple communication formats |
| CN103825764A (en) * | 2014-02-28 | 2014-05-28 | 戈顿三希科技（南京）有限公司 | Data collecting instrument monitoring system based on cloud calculation and method for enhancing communication stability of data collecting instrument monitoring system based on cloud calculation |
| CN106643886A (en) * | 2016-12-02 | 2017-05-10 | 淄博爱赛维斯网络技术服务有限公司 | Solar thermal energy metering, monitoring and collecting system and application method thereof |
| CN107145109A (en) * | 2017-06-14 | 2017-09-08 | 合肥赛度电子科技有限公司 | A kind of photovoltaic plant intelligent monitoring data acquisition unit |
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| CN101917137A (en) * | 2010-07-06 | 2010-12-15 | 上海淘科网络技术有限公司 | Network monitor and management platform of solar photovoltaic generation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101917137A (en) * | 2010-07-06 | 2010-12-15 | 上海淘科网络技术有限公司 | Network monitor and management platform of solar photovoltaic generation system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001980A (en) * | 2011-09-08 | 2013-03-27 | 黄利刚 | Solar combiner box data acquiring and processing module supportive to multiple communication formats |
| CN102664390A (en) * | 2012-05-22 | 2012-09-12 | 普尔盾电气（上海）有限公司 | Digital general protection observing and controlling device |
| CN103825764A (en) * | 2014-02-28 | 2014-05-28 | 戈顿三希科技（南京）有限公司 | Data collecting instrument monitoring system based on cloud calculation and method for enhancing communication stability of data collecting instrument monitoring system based on cloud calculation |
| CN103825764B (en) * | 2014-02-28 | 2017-05-10 | 江苏三希科技股份有限公司 | Data collecting instrument monitoring system based on cloud calculation and method for enhancing communication stability of data collecting instrument monitoring system based on cloud calculation |
| CN106643886A (en) * | 2016-12-02 | 2017-05-10 | 淄博爱赛维斯网络技术服务有限公司 | Solar thermal energy metering, monitoring and collecting system and application method thereof |
| CN107145109A (en) * | 2017-06-14 | 2017-09-08 | 合肥赛度电子科技有限公司 | A kind of photovoltaic plant intelligent monitoring data acquisition unit |
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Application publication date: 20110525 |